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main.go
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main.go
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package main
import (
"log"
"os"
"strings"
"example.com/memorydb-cdk8s/imports/acl_memorydbservicesk8saws"
"example.com/memorydb-cdk8s/imports/memorydbservicesk8saws"
"example.com/memorydb-cdk8s/imports/servicesk8saws"
"example.com/memorydb-cdk8s/imports/subnetgroups_memorydbservicesk8saws"
"example.com/memorydb-cdk8s/imports/users_memorydbservicesk8saws"
"github.com/aws/constructs-go/constructs/v10"
"github.com/aws/jsii-runtime-go"
"github.com/cdk8s-team/cdk8s-core-go/cdk8s/v2"
"github.com/cdk8s-team/cdk8s-plus-go/cdk8splus22/v2"
)
type MyChartProps struct {
cdk8s.ChartProps
}
const appPort = 8080
const lbPort = 9090
// field export
const fieldExportNameForClusterEndpoint = "export-memorydb-endpoint"
const fieldExportNameForUsername = "export-memorydb-username"
const configMapName = "export-memorydb-info"
var cfgMap cdk8splus22.ConfigMap
var fieldExportForClusterEndpoint servicesk8saws.FieldExport
var fieldExportForUsername servicesk8saws.FieldExport
var secret cdk8splus22.Secret
var memoryDBCluster memorydbservicesk8saws.Cluster
var user users_memorydbservicesk8saws.User
const secretName = "memdb-secret"
const secretKeyName = "password"
var memoryDBClusterName string
var memoryDBPassword string
var subnetIDs string
var securityGroupID string
const memoryDBUserAccessString = "on ~* &* +@all"
var memoryDBUsername string
var appDockerImage string
const memoryDBACLName = "demo-acl"
const memoryDBSubnetGroup = "demo-subnet-group"
const memoryDBNodeType = "db.t4g.small"
const memoryDBEngineVersion = "6.2"
func init() {
memoryDBClusterName = os.Getenv("MEMORYDB_CLUSTER_NAME")
if memoryDBClusterName == "" {
memoryDBClusterName = "memorydb-cluster-ack-cdk8s"
log.Println("using default cluster name for memorydb - memorydb-cluster-ack-cdk8s")
}
memoryDBUsername = os.Getenv("MEMORYDB_USERNAME")
if memoryDBUsername == "" {
memoryDBUsername = "demouser"
log.Println("using default username for memorydb - demouser")
}
memoryDBPassword = os.Getenv("MEMORYDB_PASSWORD")
if memoryDBPassword == "" {
memoryDBPassword = "Password123456789"
log.Println("using default password for memorydb - Password123456789")
}
subnetIDs = os.Getenv("SUBNET_ID_LIST")
if subnetIDs == "" {
log.Fatal("missing environment variable SUBNET_ID_LIST")
}
securityGroupID = os.Getenv("SECURITY_GROUP_ID")
if securityGroupID == "" {
log.Fatal("missing environment variable SECURITY_GROUP_ID")
}
appDockerImage = os.Getenv("DOCKER_IMAGE")
if appDockerImage == "" {
log.Fatal("missing environment variable DOCKER_IMAGE")
}
}
func NewMemoryDBChart(scope constructs.Construct, id string, props *MyChartProps) cdk8s.Chart {
var cprops cdk8s.ChartProps
if props != nil {
cprops = props.ChartProps
}
chart := cdk8s.NewChart(scope, jsii.String(id), &cprops)
secret = cdk8splus22.NewSecret(chart, jsii.String("password"), &cdk8splus22.SecretProps{
Metadata: &cdk8s.ApiObjectMetadata{Name: jsii.String(secretName)},
StringData: &map[string]*string{"password": jsii.String(memoryDBPassword)},
})
user = users_memorydbservicesk8saws.NewUser(chart, jsii.String("user"), &users_memorydbservicesk8saws.UserProps{
Metadata: &cdk8s.ApiObjectMetadata{Name: jsii.String(memoryDBUsername)},
Spec: &users_memorydbservicesk8saws.UserSpec{
Name: jsii.String(memoryDBUsername),
AccessString: jsii.String(memoryDBUserAccessString),
AuthenticationMode: &users_memorydbservicesk8saws.UserSpecAuthenticationMode{
Type: jsii.String("Password"),
Passwords: &[]*users_memorydbservicesk8saws.UserSpecAuthenticationModePasswords{
{Name: secret.Name(), Key: jsii.String(secretKeyName)},
},
},
},
})
acl := acl_memorydbservicesk8saws.NewAcl(chart, jsii.String("acl"),
&acl_memorydbservicesk8saws.AclProps{
Metadata: &cdk8s.ApiObjectMetadata{Name: jsii.String(memoryDBACLName)},
Spec: &acl_memorydbservicesk8saws.AclSpec{
Name: jsii.String(memoryDBACLName),
UserNames: jsii.Strings(*user.Name()),
},
})
subnetGroup := subnetgroups_memorydbservicesk8saws.NewSubnetGroup(chart, jsii.String("sg"),
&subnetgroups_memorydbservicesk8saws.SubnetGroupProps{
Metadata: &cdk8s.ApiObjectMetadata{Name: jsii.String(memoryDBSubnetGroup)},
Spec: &subnetgroups_memorydbservicesk8saws.SubnetGroupSpec{
Name: jsii.String(memoryDBSubnetGroup),
//SubnetIDs: jsii.Strings("subnet-086c4a45ec9a206e1", "subnet-0d9a9c6d2ca7a24df", "subnet-028ca54bb859a4994"), //same as EKS clsuter
SubnetIDs: jsii.Strings(strings.Split(subnetIDs, ",")...), //same as EKS clsuter
},
})
memoryDBCluster = memorydbservicesk8saws.NewCluster(chart, jsii.String("memorydb-ack-cdk8s"),
&memorydbservicesk8saws.ClusterProps{
Metadata: &cdk8s.ApiObjectMetadata{Name: jsii.String(memoryDBClusterName)},
Spec: &memorydbservicesk8saws.ClusterSpec{
Name: jsii.String(memoryDBClusterName),
NodeType: jsii.String(memoryDBNodeType),
AclName: acl.Name(),
EngineVersion: jsii.String(memoryDBEngineVersion),
NumShards: jsii.Number(1),
NumReplicasPerShard: jsii.Number(1),
SecurityGroupIDs: jsii.Strings(securityGroupID), //same as EKS clsuter clusterSecurityGroupId
SubnetGroupName: subnetGroup.Name(),
},
})
return chart
}
func NewConfigChart(scope constructs.Construct, id string, props *MyChartProps) cdk8s.Chart {
var cprops cdk8s.ChartProps
if props != nil {
cprops = props.ChartProps
}
chart := cdk8s.NewChart(scope, jsii.String(id), &cprops)
cfgMap = cdk8splus22.NewConfigMap(chart, jsii.String("config-map"),
&cdk8splus22.ConfigMapProps{
Metadata: &cdk8s.ApiObjectMetadata{
Name: jsii.String(configMapName)}})
fieldExportForClusterEndpoint = servicesk8saws.NewFieldExport(chart, jsii.String("fexp-cluster"), &servicesk8saws.FieldExportProps{
Metadata: &cdk8s.ApiObjectMetadata{Name: jsii.String(fieldExportNameForClusterEndpoint)},
Spec: &servicesk8saws.FieldExportSpec{
From: &servicesk8saws.FieldExportSpecFrom{Path: jsii.String(".status.clusterEndpoint.address"),
Resource: &servicesk8saws.FieldExportSpecFromResource{
Group: jsii.String("memorydb.services.k8s.aws"),
Kind: jsii.String("Cluster"),
Name: memoryDBCluster.Name()}},
To: &servicesk8saws.FieldExportSpecTo{
Name: cfgMap.Name(),
Kind: servicesk8saws.FieldExportSpecToKind_CONFIGMAP}}})
fieldExportForUsername = servicesk8saws.NewFieldExport(chart, jsii.String("fexp-username"), &servicesk8saws.FieldExportProps{
Metadata: &cdk8s.ApiObjectMetadata{Name: jsii.String(fieldExportNameForUsername)},
Spec: &servicesk8saws.FieldExportSpec{
From: &servicesk8saws.FieldExportSpecFrom{Path: jsii.String(".spec.name"),
Resource: &servicesk8saws.FieldExportSpecFromResource{
Group: jsii.String("memorydb.services.k8s.aws"),
Kind: jsii.String("User"),
Name: user.Name()}},
To: &servicesk8saws.FieldExportSpecTo{
Name: cfgMap.Name(),
Kind: servicesk8saws.FieldExportSpecToKind_CONFIGMAP}}})
return chart
}
func NewDeploymentChart(scope constructs.Construct, id string, props *MyChartProps) cdk8s.Chart {
var cprops cdk8s.ChartProps
if props != nil {
cprops = props.ChartProps
}
chart := cdk8s.NewChart(scope, jsii.String(id), &cprops)
dep := cdk8splus22.NewDeployment(chart, jsii.String("memorydb-app-deployment"), &cdk8splus22.DeploymentProps{
Metadata: &cdk8s.ApiObjectMetadata{
Name: jsii.String("memorydb-app")}})
container := dep.AddContainer(
&cdk8splus22.ContainerProps{
Name: jsii.String("memorydb-app-container"),
Image: jsii.String(appDockerImage),
Port: jsii.Number(appPort)})
container.Env().AddVariable(jsii.String("MEMORYDB_CLUSTER_ENDPOINT"),
cdk8splus22.EnvValue_FromConfigMap(
cfgMap,
jsii.String("default."+*fieldExportForClusterEndpoint.Name()),
&cdk8splus22.EnvValueFromConfigMapOptions{Optional: jsii.Bool(false)}))
container.Env().AddVariable(jsii.String("MEMORYDB_USERNAME"),
cdk8splus22.EnvValue_FromConfigMap(
cfgMap,
jsii.String("default."+*fieldExportForUsername.Name()),
&cdk8splus22.EnvValueFromConfigMapOptions{Optional: jsii.Bool(false)}))
container.Env().AddVariable(jsii.String("MEMORYDB_PASSWORD"),
cdk8splus22.EnvValue_FromSecretValue(
&cdk8splus22.SecretValue{
Secret: secret,
Key: jsii.String("password")},
&cdk8splus22.EnvValueFromSecretOptions{}))
dep.ExposeViaService(
&cdk8splus22.DeploymentExposeViaServiceOptions{
Name: jsii.String("memorydb-app-service"),
ServiceType: cdk8splus22.ServiceType_LOAD_BALANCER,
Ports: &[]*cdk8splus22.ServicePort{
{Protocol: cdk8splus22.Protocol_TCP,
Port: jsii.Number(lbPort),
TargetPort: jsii.Number(appPort)}}})
return chart
}
func main() {
app := cdk8s.NewApp(nil)
memorydb := NewMemoryDBChart(app, "memorydb", nil)
config := NewConfigChart(app, "config", nil)
config.AddDependency(memorydb)
deployment := NewDeploymentChart(app, "deployment", nil)
deployment.AddDependency(memorydb, config)
app.Synth()
}